<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区  用户的数据 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex-0" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab侧边栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择器 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单Item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="(item) in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的位置 -->
            <el-upload
              :on-success="handleSuccess"
              class="upload-demo"
              :headers="headerObj"
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button class="btnAdd" @click="add" type="primary">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片的对话框 -->
    <el-dialog title="预览图片" :visible.sync="previewDialogVisible" width="50%">
      <!-- 图片位置 -->
      <img :src="previewPath" alt class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
//导入 lodash 模块  在vue ui 的可视化面板中配置依赖
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: "0",
      //添加商品的1表单验证对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属分类
        goods_cat: [],
        //上传图片路径的数组
        pics: [],
        //商品详情
        goods_introduce: "",
        //
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: "请输入商品名称",
            trigger: "blur",
          },
        ],
        goods_price: [
          {
            required: true,
            message: "请输入商品价格",
            trigger: "blur",
          },
        ],
        goods_weight: [
          {
            required: true,
            message: "请输入商品重量",
            trigger: "blur",
          },
        ],
        goods_number: [
          {
            required: true,
            message: "请输入商品数量",
            trigger: "blur",
          },
        ],
        goods_cat: [
          {
            required: true,
            message: "请选择商品类别",
            trigger: "blur",
          },
        ],
      },
      //商品分类数据
      catelist: [],
      //
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //动态参数保存
      manyTableData: [],
      //参数类型动态
      activeName: "many",
      //静态属性
      onlyTableData: [],
      //请求头的token 由于el-upload自己封装了ajax 并没有请求头的token 所以
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      previewPath: "",
      previewDialogVisible: false,
    };
  },

  components: {},

  created() {
    this.getCateList();
  },

  computed: {
    //获取选中的三级分类的id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },

  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");

      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败！请尝试刷新");
      }

      this.catelist = res.data;
    },
    //级联选择器选中项触发change
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //判断基本信息是否填完整，是就可以跳到ss下面去，否则不行
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //动态参数
    async many() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败！请尝试刷新");
      }
      //console.log(res.data);
      res.data.forEach((item) => {
        item.attr_vals =
          item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
      });
      // console.log(res.data)
      this.manyTableData = res.data;
    },
    //静态属性
    async only() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: "only" },
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败！请尝试刷新");
      }

      this.onlyTableData = res.data;
    },
    tabClicked() {
      //判断是否选中商品价格
      var v = parseInt(this.activeIndex);
      switch (v) {
        case 1:
          this.many();
          break;
        case 2:
          this.only();
          break;
      }
    },
    //处理图片预览事件
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewDialogVisible = true;
    },
    //移除图片的操作
    handleRemove(file) {
      //1.获取将要删除的图片临时路径
      const filePath = file.response.data.tmp_path;
      //2.从 pics 数组中找到这个图片对应索引值
      const i = this.addForm.pics.findIndex((x) => {
        x.pic === filePath;
      });
      //3.调用数组 splice 方法从pics数组中移除
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    //图片上传成功的事件
    handleSuccess(response) {
      //1.拼接图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      //2.将图片路径push到addForm 里面的pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    add() {
      this.$refs.addFormRef.validate( async (vaild) => {
        if (!vaild) {
          return this.$message.error("请填写必要的表单项");
        }
      
      //执行添加的业务逻辑
      //运用lodash 的深拷贝 由于后端接受的是一个字符串，而
      //addFrom.goods_cat在上面是定义为数组的 又因为双向绑定了直接修改会影响上面的
      //所以采用深拷贝 ，然后将深拷贝的数据发送给后端
     const form = _.cloneDeep(this.addForm)
     form.goods_cat = form.goods_cat.join(',')
//处理动态参数
     this.manyTableData.forEach((item)=>{
       const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
       this.addForm.attrs.push(newInfo)
     })

     //静态参数
      this.onlyTableData.forEach((item)=>{
       const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
       this.addForm.attrs.push(newInfo)
     })
     form.attrs = this.addForm.attrs

     //发起请求添加商品 
    const {data: res} = await this.$http.post('goods', form)

    if(res.meta.status !==201) {
      return this.$message.error('添加商品失败')
    }

    this.$message.success('添加商品成功')
    //添加成功后跳转到商品页面 通过路由守卫
    this.$router.push('/goods')
    // console.log(form)
     });
    },
  },
};
</script>
<style lang='less' scoped>
.el-checkbox {
  margin: 0px 10px 0px 0px !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>